need help in outbound syntax (closed)

I want to rewrite app.com/cms/en-us/home.aspx -> app.com/en-us/home

i tested with this syntax in IIS test pattern, it show good:

                <rule name="cms out">
                    <match filterByTags="None" pattern="^/cms/([_0-9a-z-/]+)([_0-9a-z-/.]+)" />
                    <action type="Rewrite" value="/{R:1}" />
                </rule>

but it just doesn't work in my simple test.aspx with

    <a href="/cms/en-us/home.aspx" mce_href="/cms/en-us/home.aspx">Test Outbound</a>

I expect the browser should show "/en-us/home"